Debian DLA-97-1 : eglibc security update

Medium Nessus Plugin ID 82242

Synopsis

The remote Debian host is missing a security update.

Description

CVE-2012-6656

Fix validation check when converting from ibm930 to utf. When converting IBM930 code with iconv(), if IBM930 code which includes invalid multibyte character '0xffff' is specified, then iconv() segfaults.

CVE-2014-6040

Crashes on invalid input in IBM gconv modules [BZ #17325] These changes are based on the fix for BZ #14134 in commit 6e230d11837f3ae7b375ea69d7905f0d18eb79e5.

CVE-2014-7817

The function wordexp() fails to properly handle the WRDE_NOCMD flag when processing arithmetic inputs in the form of '$((... ``))' where '...' can be anything valid. The backticks in the arithmetic epxression are evaluated by in a shell even if WRDE_NOCMD forbade command substitution. This allows an attacker to attempt to pass dangerous commands via constructs of the above form, and bypass the WRDE_NOCMD flag. This patch fixes this by checking for WRDE_NOCMD in exec_comm(), the only place that can execute a shell. All other checks for WRDE_NOCMD are superfluous and removed.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2014/11/msg00015.html

https://packages.debian.org/source/squeeze-lts/eglibc

Plugin Details

Severity: Medium

ID: 82242

File Name: debian_DLA-97.nasl

Version: 1.9

Type: local

Agent: unix

Published: 2015/03/26

Updated: 2018/07/09

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:eglibc-source, p-cpe:/a:debian:debian_linux:glibc-doc, p-cpe:/a:debian:debian_linux:libc-bin, p-cpe:/a:debian:debian_linux:libc-dev-bin, p-cpe:/a:debian:debian_linux:libc6, p-cpe:/a:debian:debian_linux:libc6-amd64, p-cpe:/a:debian:debian_linux:libc6-dbg, p-cpe:/a:debian:debian_linux:libc6-dev, p-cpe:/a:debian:debian_linux:libc6-dev-amd64, p-cpe:/a:debian:debian_linux:libc6-dev-i386, p-cpe:/a:debian:debian_linux:libc6-i386, p-cpe:/a:debian:debian_linux:libc6-i686, p-cpe:/a:debian:debian_linux:libc6-pic, p-cpe:/a:debian:debian_linux:libc6-prof, p-cpe:/a:debian:debian_linux:libc6-udeb, p-cpe:/a:debian:debian_linux:libc6-xen, p-cpe:/a:debian:debian_linux:libnss-dns-udeb, p-cpe:/a:debian:debian_linux:libnss-files-udeb, p-cpe:/a:debian:debian_linux:locales, p-cpe:/a:debian:debian_linux:locales-all, p-cpe:/a:debian:debian_linux:nscd, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/11/29

Reference Information

CVE: CVE-2012-6656, CVE-2014-6040, CVE-2014-7817

BID: 69470, 69472, 71216